Created issue 'Accept attribute should allow file extensions in addition to the current allowed values' nickname accept-file-ext owned by Julian Reschke on product HTML 5 spec, description '(raised on behalf of sharco@microsoft.com):
The spec states: â€œThe accept attribute may be specified to provide
user agents with a hint of what file types will be accepted.â€ The options
currently allowed in the accept attribute are mime types and the special tokens
â€œaudio/*â€, â€œimage/*â€, â€œvideo/*â€. Allowing file extensions to be a token would
help many developers and fits in exactly with the purpose of the accept
attribute.
See <https://www.w3.org/Bugs/Public/show_bug.cgi?id=11482>.' non-public/html/wg/tracker/issues/197#2012-01-14T12:47:38Z2012-01-14T12:47:38ZJulian Reschke

The spec states: â€œThe accept attribute may be specified to provide
user agents with a hint of what file types will be accepted.â€ The options
currently allowed in the accept attribute are mime types and the special tokens
â€œaudio/*â€, â€œimage/*â€, â€œvideo/*â€. Allowing file extensions to be a token would
help many developers and fits in exactly with the purpose of the accept
attribute.